[Halld-offline] NAN values for GetPull();

[Craig Bookwalter]

Hi Blake,
    I'm using the CMU kinematic fitter for some CLAS data, and I've had 
a similar problem to what you're having. It turned out my input 
covariance matrix contained some outlandish values (like 1e308's and 
similar) and it was causing the fitter to spout nonsense. I'd suggest 
looking at the values of your covariance matrix and input vectors and 
making sure they're not corrupted somehow before they make it into the 
fitter. My $0.02.

    --cb

Curtis A. Meyer wrote:
> Hi Blake -
>
>    we started playing with this again at CMU, but unfortunately the code
> has been orphaned since Matt Bellis left a couple of years ago. I am a bit
> surprised that it stopped working as I do  not believe that anything in 
> the KINFIT
> code has changed.
>
>    curtis
>
> On 3/8/10 5:24 PM, Blake Leverington wrote:
>   
>> Hey all,
>>
>> Any ideas on why kfit->GetPull(0); in DKinFit returns NAN though
>> kfit->Prob(); still returns reasonable values? I remember this working
>> months ago, put I can't get the pulls from the kinematic fitter anymore,
>> and I think I need to see this for my analysis at the moment.
>>
>> Who is maintaining the kinematic fitter now?
>>
>> -Blake
>> _______________________________________________
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>>
>>    
>>     
>
>
>   


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 Craig Bookwalter			FSU Office:  (850) 644 3808
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